When in a battle with a Shadow Pokémon, have the first Pokémon that is selected use any type of Poké Ball. With the second Pokémon, go back to the items screen and switch the Poké Ball used with another in the pocket using the Y button. After exiting the menu, proceed normally, and when Wes uses the Ball, the number in the bag will not go down.

When in a battle with a Shadow Pokémon, have the first Pokémon that is selected use any type of Poké Ball. With the second Pokémon, go back to the items screen and switch the Poké Ball used with another in the pocket using the Y button. After exiting the menu, proceed normally, and when Wes uses the Ball, the number in the bag will not go down.

Pokémon Colosseum (Japanese: ポケモンコロシアム) was released on November 21, 2003 in Japan, March 22, 2004 in North America and May 14, 2004 in Europe on the Nintendo GameCube. The game followed the basic stadium style battling found in the Pokémon Stadium games but an extra was included in the form of an RPG which allowed trainers to catch Generation II and Generation III Pokémon in the desolate region of Orre.

In the game, the player characterWes was part of an organization called Team Snagem and they obtained a machine which allowed someone to snag another's Pokémon as if it were wild. Another team, Cipher, was responsible for corrupting the hearts of Pokémon and giving them to Trainers. With the help of a young girl named Rui, Wes was able to find the Pokémon whose hearts were sealed and surrounded by a purple aura and use the Snag Machine to rescue Shadow Pokémon and restore them to normal.

In Phenac City, the player is given a choice between Bayleef, Quilava, or Croconaw. The other two will be available later in the game, after the credits roll. The Pokémon whose type is weak to the chosen Pokémon's type will be at the Snagem Hideout and the Pokémon whose type weakens the chosen Pokémon's type will be at the Shadow Pokémon Lab.

Prizes

Plusle is given to Wes by Duking after Wes saves it from Cipher. He asks Wes to protect it from harm and to make it stronger.

Ho-Oh

Ho-Oh is obtainable in Pokémon Colosseum when all of the Shadow Pokémon have been purified. Players would then have to use a team of Pokémon from the RPG to clear Mt. Battle in Battle Mode from zones one to 100.

Once the Heart Gauge reaches the point where it says "The Pokémon's heart is about to open! Undo the final lock!", trainers would go to the Agate Village shrine and use its power to restore the Pokémon's heart and remove the move known as Shadow Rush. Once the Pokémon has been purified, it will gain all experience it earned during the time it was a Shadow Pokémon, and acquire a special Ribbon exclusive to Purified Pokémon.

After trainers have beaten the game, Pokémon can be traded to all Generation III games provided that their hearts are open (and certain objectives have been completed in FireRed and LeafGreen, if they are being traded to). Note that trading Pokémon to Ruby and Sapphire will not unlock the National Pokédex.

Colosseums

The other half of the game consists of several Colosseum venues that trainers could send Pokémon from the RPG or the Game Boy Advance games to battle.

Rewards

While competing in the Mount Battle 100 trainer challenge in either the RPG or the Colosseum section of the game, trainers can receive Poké Coupons which can be used to buy rare TMs, items and berries. Additionally, players have the option of storing Poké Coupons on a Pokémon Ruby or Sapphire game pack for later use, if they so desire. Here is the list of what players can receive after collecting a set amount of Poké Coupons.

Glitches

Infinite Ball Glitch

When in a battle with a Shadow Pokémon, have the first Pokémon that is selected use any type of Poké Ball. With the second Pokémon, go back to the items screen and switch the Poké Ball used with another in the pocket using the Y button. After exiting the menu, proceed normally, and when Wes uses the Ball, the number in the bag will not go down.

Compatibility

Pokémon Colosseum is compatible with all five of the main series Pokémon games on the Game Boy Advance. Items and Pokémon can be traded between them in the same manner that they can be traded between each other, however, a GameCube-Game Boy Advance cable and a Game Boy Advance or GBA SP are required to do so.

The game contains 3D models of the trainers from Pokémon FireRed and LeafGreen despite being released before them. This situation is similar to that with Stadium 2, which was released on the same day as Pokémon Crystal in Japan and several months before it in other regions.

The starter Pokémon, Espeon and Umbreon, already have some EXP at the start of the game.

If one were to trade a Pokémon from Pokémon XD, it would say that it was caught at Mt. Battle, regardless of where it was actually caught in Orre, even if it was caught in an area accessible in the game.

Unlike the Stadium series, Pokémon in this game would retain their computerized voices, identical to those in the GBA games.

This game is the only game in which none of the members of the Zubat evolution family are obtainable without trading.

Contrary to rumor, Shadow Pokémon can be Shiny Pokémon when encountered. Shininess is retained through purification. A shiny Pokémon in Colosseum will emit two orange 'orbs' when sent into battle, and alternate colors are visible as expected. The probability of shinies is the same as it is in the handheld games (1/8192).